Gas-cooler.



N0. 866,169. 4 PATENTED SEPT. 17, 1907.

' J. voLLMBR.

GAS cooLER.

LPPLIOATIOK FILED TBB. 21', A1906.

3 SHEETS-SHEET 1.

No. 866,169. PATE-MBD SEPT. 1v, 1907.

- J. VOLLMBR.. GAS COOLER.

APPLIOATIOIPILED FEB. 21, 1906.

3 SHEETS-SHEET 2.

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PATENTE!) SEEE. 17, 19o?,

J. VOLLMEE. GAS GOOLEE. APPLIOTION FILED PEB. 21, 1906.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

GAS-COOLER.

Specification of Letters Patent.

Patented Sept. 17, 190'?.

Application filed February 21, 1906. Serial No. 302,180.

To all whom it may concern:

Be it known that I, JOHN VoLLMnR, of Boston, in the county oi: Suffolk and State oi Massachusetts, a citizen oi the United States, have invented a new and useful Improvement in Gas-Coolers, of which the following is a specification.

The gas cooler herein described which embodies my invention is especially adapted for use in wood-pulpmaking systems where it is necessary to cool the gas beiore it will combine with lime water or other similar material. As the apparatus, however', does not depend for its value upon the kind oi gas used with it I do not mean to describe myinvention as limited to a wood-pulp system in which any especial kind of gas is used, nor do I mean to limit its use to the forming oi a part ot a wood-pulp system as it may be equally useful under other' conditions.

It consists primarily in providing a gas cooler with a dust chamber wherein the dust or other solid impurities brought over by the gas may be collected at a point where it will not interfere with the cooling of the gas and from which it may be removed without taking the entire apparatus apart.

In gas coolers such as are ordinarily used the gas is passed through a coil oi pipe located in a water bath kept at a proper temperature but, more especially in the suliite or pyrites processes, so-called, the gas often brings over solid impurities in the form oi dust, more or less sulfur, etc., and these impurities stick to the walls of the pipe, thereby not only reducing the size oi the interior of the pipe and thus retarding the How oi gas, but also by thickening the walls oi the pipe reducing the eiiiciency oi the water surrounding the coil as a cooler.

My invention will be understood by reference to the drawings, in which- Figure l is a iront elevation of my apparatus, the front wall of the tank being removed to show its interior ar rangement. Fig. 2 is a horizontal section on line 2-2 of Fig. l. Fig. S'shows a modicationl A is a water-tight wooden tank on the floor oi which my apparatus stands. This tank is provided with suitable means for keeping it full of water at proper temperature and with an overflow a leading to the sewer or other convenient place. v

The main portion oi my invention comprises a gas cooling chamber oi peculiar construction. The gas chamber as shown in Fig. l is comprised oi two sections B and B1. Each section has a number of cross pipes b passing through it and open at each end to the fluid with which the tank A is iilled so that there may be a constant circulation of the cooling fluid through these pipes, and I prefer that the pipes passing through the section B shall be at right angles to those passing through the section B1 in order to cause a more general movement oi the gas within the gas chamber as it rises from the bottom to the top oi the chamber. The chamber is preferably closed at the top by means of a dome B2 connected with a T-joint E, by means of which the apparatus may be connected with the pipe running to the mixing tank. In the dome I also provide one or more openings covered with suitable covers f by means oi which when the covers are removed the interior of the gas chamber may be washed out irom time to time and at the bottom of the gas chamber I provide a water outlet jl which as shown is in the form of a trap so that the water with which the interior of the chamber is to be washed, or any moisture which may be collected in the chamber from time to time, may run ofi. As shown in Fig. l this chamber has an inlet at b1 provided with a suitable flange by which it is connected with a T-joint D, one end oi which runs through a side wall of the water tank, while the other connects with the vertical pipe O. This pipe leads into the tank from the feed pipe C2, being connected thereto by the joint G1. I have shown the joint O1 as a T, one'end of which is closed by the cover c. The end oi the joint D which runs through the side wall of the tank has a cover d which is removable so that the interior oi the chamber within the lower part of the gas cooling chamber may be easily cleaned out.

The lower part oi the gas chamber below the lowest pipes b forms an unobstructed dust chamber indicated by the letter B3, into which the dust, flowers of sulfur, or other solid impurities are driven by the torce of the gas entering through the pipe O. Here, however, they are dropped by the gas as it changes direction, and remain. Such particles as may be carried up through the gas cooling chamber and have become disentangled from the gas as it passes around the pipes b will fall back into this dust chamber.

In the operation of my apparatus the tank A is first filled with water at a low temperature up to a level practically controlled by the overflow a. The temperature is maintained by any suitable means, tor example,a continuous stream of water running into the tank. The gas ilows in through the pipe C and joint D, and getting a certain amount of chilling in its downward passage enters the dust chamber B3 and leaves there its solid impurities. Passing up through the 100 cooler it engages and is brought in thorough contact with the various cross pipes through which as the temperature oi the water changes there is a constant circulation thereof. It will be noted that the pipes b are arranged to obstruct the path of the gas so that its` 105 I have shown in Fig. 3 another iorm oi gas chamber 110 which embodies my invention. I have found that it is more convenient in some places to place the gas inlet and outlet to a cooler at the bottom o the tank, and in Fig. 3 I have shown simply the gas cooling chamber which is intended to rest upon the floor oi the tank, the tank being omitted, In this case the inlet is represented at C1, the outlet at E1 and the circulation 'oi gas is caused by the wall of cross tubes b2 which with the tubes b not only furnish an opportunity for circulation of water across the gas chamber for cooling purposes, but these tubes b2 being close together cause the gas or the greater part oi it to pass upward and over the top thereof and down the further side to the outlet E. In this case the dust chamber is also shown at B3 located at the gas inlet and below the lowest o the tubes b, though oi course not below the wall of tubes b2 which runs to the bottom of the gas chamber. Other variations o this idea will no doubt occur to one skilled in the art, the main novelty of this apparatus consisting in providing a dust chamber in the path oi the gas and preferably before its cooling takes place, in which it may drop any matters mechanically carried by it so that they will not be Ataken up by other portions of the apparatus located Where it is difficult to get at them to clean them. I also believe that the idea of cooling the gas by a series O pipes containing a cooling fluid passing across the line oi movement of the gas and in its path is new with me. Apparatus of this character should of course be constructed of such material as will not be corroded by the gas and for this purpose I have found lead under all ordinary conditions the best material.

What I claim as my invention is 1. A gas cooler having a tank, a gasreceiving chamber located inside said tank and having a series of circulating tubes passing through it in communication with the interior of the tank, and a gas inlet pipe leading down into said tank to connect with said gas-receiving chamber at or near the bottom thereof.

2. A gas cooler having a tank, a gas inlet pipe leading Y down into said tank, a gas-receiving chamber also located within said'tank, a joint connecting said inlet pipe with said gas chamber, a manhole located in said joint in line with the lower part of said gas chamber, and provided with a suitable cover whereby upon the removal of said cover the lower part of said gas chamber may be cleaned, as andfor the purposes specied.

3. A gas cooler having a tank and inside the same a gas-receiving; chamber, man-holes located at the top of said gas-receiving chamber forming access to the interior thereof, and at the bottom of said chamber an outlet hav ing formed therein a trap.

4l A gas cooler having a gas-receiving chamber provided with an inlet at or near the bottom thereof, a gas outlet to said chamber at or near the bottom thereof, and intermediate said inlet and outlet passages means whereby the gas will be made to circulate upwardly through said tank, thence down to said outlet passage, substantially as described.

JOHN VOLLMER.

Witnesses GEORGE O. G. COALE, M. E. FLAI-mmm. 

